Regional totals	Periodo	Total
National Total	2022	6,88
National Total	2021	7,1
National Total	2020	7,19
National Total	2019	7,62
National Total	2018	7,94
National Total	2017	8,41
National Total	2016	8,8
National Total	2015	9,02
National Total	2014	9,18
National Total	2013	9,11
National Total	2012	9,7
National Total	2011	10,07
National Total	2010	10,42
National Total	2009	10,65
National Total	2008	11,28
National Total	2007	10,86
National Total	2006	10,85
National Total	2005	10,65
National Total	2004	10,57
National Total	2003	10,44
National Total	2002	10,08
National Total	2001	9,94
National Total	2000	9,78
National Total	1999	9,39
National Total	1998	9,06
National Total	1997	9,2
National Total	1996	9,07
National Total	1995	9,15
National Total	1994	9,35
National Total	1993	9,8
National Total	1992	10,13
National Total	1991	10,16
National Total	1990	10,32
National Total	1989	10,51
National Total	1988	10,79
National Total	1987	11,02
National Total	1986	11,36
National Total	1985	11,85
National Total	1984	12,34
National Total	1983	12,71
National Total	1982	13,57
National Total	1981	14,1
National Total	1980	15,22
National Total	1979	16,17
National Total	1978	17,25
National Total	1977	17,96
National Total	1976	18,73
National Total	1975	18,7